[3] The scientific objectives of the CONSERT experiment are the determination of the main dielectric properties and, through modelling, to set constraints on the cometary composition (materials, porosity, etc.
A detailed analysis of the radio–waves which have passed through all or parts of the nucleus will put real constraints on the materials and on inhomogeneities and will help to identify blocks, gaps or voids.
[citation needed] An electromagnetic wave–front propagates through the cometary nucleus at a smaller velocity than in free space, and loses energy in the process.
[citation needed] The lander communicated with the Rosetta orbiter again on 9 July 2015 and transmitted measurement data from the CONSERT instrument.
[4] This article incorporates public domain material from Comet Nucleus Sounding Experiment by Radiowave Transmission (CONSERT).